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Modern Tractor Discussion Board Re: A/C question [ Expand ] [ View Replies ] [ Add a Reply ] [ Return to Forum ] Posted by Blue Buddy on June 06, 2009 at 05:47:48 from (67.220.44.236): In Reply to: A/C question posted by matt miller on June 02, 2009 at 08:04:59: recharging A/C is not only about filling the system, if the system has leaked empty, you have to get the air ( and especially any moisture in that air)out of it first, and that is going to need a vacuum pump for 20 to 30 minutes, air in the system will cause it to not cool (and the moisture will freeze inside as well as cause acids and rust in the system), even with refrigerant mixed in it, also, if a line blew, some oil will have leaked out, so it will need to be topped up as well(special oil) - the valves on the line fittings (1/4 in wrench)need to be in the middle position to charge or drain, all the way out closes the charge port, all the way in closes off the line going to the compressor, connect charge hose, turn valve in part way, turn valve out before removing charge hose Replies: Add a Reply Name: E-Mail: Subject: Comments: Optional Link URL: Link Title: Optional Image URL: Optional Video Title: Optional Video URL: Advanced Posting Options Email Notification: If you check this box, email will be sent to you whenever someone replies to this message. Your email address must be entered above to receive notification. This notification will be cancelled automatically after 2 weeks.   Advanced Posting Tools   Upload Photo  Select Gallery Photo  Return to Post